# quick_exit

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< c‎ | program

Defined in header ``<stdlib.h>`` |  |
_Noreturn void quick_exit( int exit_code ); |  | (since C11) (until C23)
[[noreturn]] void quick_exit( int exit_code ); |  | (since C23)

Causes normal program termination to occur without completely cleaning the resources.

Functions passed to at_quick_exit are called in reverse order of their registration. After calling the registered functions, calls _Exit(exit_code).

Functions passed to atexit or signal handlers passed to signal are not called.

### Parameters

exit_code | - | exit status of the program

### Return value

(none)

### Example

Run this code

    #include <stdlib.h>
    #include <stdio.h>

    void f1(void)
    {
        puts("pushed first");
        fflush(stdout);
    }

    void f2(void)
    {
        puts("pushed second");
    }

    void f3(void)
    {
        puts("won't be called");
    }

    int main(void)
    {
        at_quick_exit(f1);
        at_quick_exit(f2);
        atexit(f3);
        quick_exit(0);
    }

Output:

    pushed second
    pushed first

### References

- C17 standard (ISO/IEC 9899:2018):

  - 7.22.4.7 The quick_exit function (p: 257)

- C11 standard (ISO/IEC 9899:2011):

  - 7.22.4.7 The quick_exit function (p: 353)

### See also

abort | causes abnormal program termination (without cleaning up) (function)
atexit | registers a function to be called on exit() invocation (function)
at_quick_exit (C11) | registers a function to be called on `quick_exit` invocation (function)
C++ documentation for quick_exit

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